Blowing device for heat treatment material before entering furnace

Abstract

The utility model discloses a blowing device for heat treatment materials before entering a furnace. The blowing device comprises a box body, a spray pipe and a nozzle, the box body covers the furnace front roller way and is provided with a heat treatment material inlet and outlet; the spray pipes extend into the box body, are vertically distributed along a heat treatment material passing line and are positioned between the conveying rollers, inlet ends of the spray pipes are connected with a drying air pipeline outside the box body, and the upstream of the drying air pipeline exchanges heat with flue gas generated by combustion of a burner of the heat treatment furnace body through a heat exchanger; the nozzles are distributed on the spray pipe and point to the heat treatment material passing line. The device not only is high in drying efficiency, but also can preheat a heat treatment material by utilizing flue gas, so that the energy consumption level in the subsequent heat treatment process is reduced.

Description

Technical Field

[0001] The invention belongs to the field of heat treatment in metallurgical industry, and in particular relates to a blowing device for heat treatment materials before they enter a furnace. Background Art

[0002] Before heat treatment materials enter the heat treatment furnace for heat treatment, it is usually necessary to remove residual water stains and dust on the surface, otherwise the heat treatment process will cause defects on the surface of the product, affecting the added value of the product. The conventional treatment method before heat treatment materials enter the furnace is to use a nozzle to spray cold air on the heat treatment materials. Although this method is simple and direct, it can accelerate the evaporation of water on the surface of the heat treatment materials and remove residual dust on the surface, but the cold air spray drying efficiency is low, and it can also take away the residual heat of the heat treatment materials themselves, increasing the energy consumption level in the subsequent heat treatment process. Utility Model Content

[0003] The utility model aims to provide a blowing device for heat treatment materials before they enter a furnace, which not only has high drying efficiency but also can utilize flue gas to preheat the heat treatment materials, thereby reducing the energy consumption level in the subsequent heat treatment process.

[0004] The technical solution adopted by the utility model is:

[0005] A pre-blow device for heat treatment material entering a furnace comprises a box, a spray pipe and a nozzle; the box is covered on a roller in front of the furnace and has an inlet and outlet for the heat treatment material; the spray pipe extends into the box and is distributed up and down along a heat treatment material passing line and is located between conveying rollers, the inlet end of the spray pipe is connected to a dry air duct outside the box, and the upstream of the dry air duct exchanges heat with the flue gas generated by the combustion of the burner of the heat treatment furnace body through a heat exchanger; the nozzles are distributed on the spray pipe and point to the heat treatment material passing line.

[0006] Preferably, the nozzle is of an insert type, and the depth of insertion into the nozzle pipe can be adjusted.

[0007] Preferably, the insertion depth of the nozzle increases gradually from the starting end to the tail end in the working area of ​​the nozzle.

[0008] Preferably, the insertion depth of the nozzle in the middle of the nozzle working area which is located in the transverse center of the heat-treated material is the smallest, the insertion depth of the nozzle gradually decreases from the tail end to near the transverse center of the heat-treated material in the nozzle working area, and the insertion depth of the nozzle gradually increases from the starting end to near the transverse center of the heat-treated material in the nozzle working area.

[0009] Preferably, the inlet end of the nozzle is connected to the drying air duct through a flange or a hose.

[0010] Preferably, the box is installed by lifting it through a support.

[0011] The beneficial effects of the utility model are:

[0012] This device not only has high drying efficiency, but also can use flue gas to preheat the heat treatment material, reducing the energy consumption level in the subsequent heat treatment process: the drying air is preheated by the flue gas generated by the combustion of the burner of the heat treatment furnace body, and the hot drying air is sprayed on the heat treatment material. Compared with cold air spraying, it has high drying efficiency and will not take away the residual heat of the heat treatment material itself. The sprayed hot drying air will stay in the box for a period of time to preheat the heat treatment material. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a longitudinal sectional schematic diagram of a blowing device before heat treatment material enters a furnace in an embodiment of the utility model.

[0014] Figure 2 It is a cross-sectional schematic diagram of a blowing device for heat-treated materials before they enter a furnace in an embodiment of the utility model.

[0015] In the figure: 1-box; 2-spray pipe; 3-nozzle; 4-support; 5-conveying roller; 6-heat exchanger. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0019] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0020] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] The features and performance of the present application are further described in detail below in conjunction with the embodiments.

[0022] Embodiment 1

[0023] This embodiment discloses a pre-blow device for heat treatment material. Figure 1 and Figure 2 As shown, it includes a box body 1, a nozzle 2 and a nozzle 3; wherein:

[0024] The box 1 is covered on the roller table in front of the furnace and has an inlet and outlet for the heat-treated material. Figure 1 ;

[0025] The nozzle 2 extends into the box 1 and is distributed up and down along the heat treatment material passing line and is located between the conveying rollers 5. Figure 1 The inlet end of the nozzle 2 is connected to the drying air duct outside the box 1. The upstream of the drying air duct exchanges heat with the flue gas generated by the burner of the heat treatment furnace body through the heat exchanger 6. Figure 2 ;

[0026] The nozzles 3 are distributed on the nozzle 2 and point to the heat treatment material passing line, see Figure 1 and Figure 2 .

[0027] During operation, the drying air is first preheated by the flue gas generated by the combustion of the burner of the heat treatment furnace body, and the hot drying air is sprayed to the surface of the heat treatment material through the nozzle 1 in the nozzle pipe 2 to remove the water stains and dust remaining on the surface. Compared with the cold air spraying, the drying efficiency is high and the residual heat of the heat treatment material itself will not be taken away. In addition, due to the existence of the box body 1, the sprayed hot drying air will stay in the box body 1 for a period of time to exchange heat with the heat treatment material and preheat the heat treatment material. Therefore, the device not only has high drying efficiency, but also can use flue gas to preheat the heat treatment material, thereby reducing the energy consumption level in the subsequent heat treatment process.

[0028] Preferably, the nozzle 3 is of an insert type, and the depth of insertion into the nozzle pipe 2 can be adjusted. In this way, the insertion depth of the nozzle 3 at different positions can be adjusted according to the different air volumes required in different areas of the heat-treated material, thereby improving the spraying efficiency. Figure 2As shown: the insertion depth of the nozzle 3 in the middle of the working area of ​​the nozzle 2, which is in the horizontal center range of the heat-treated material, is the smallest. The insertion depth of the nozzle 3 gradually decreases from the tail end to the horizontal center of the heat-treated material in the working area of ​​the nozzle 2. The insertion depth of the nozzle 3 gradually increases from the starting end to the horizontal center of the heat-treated material in the working area of ​​the nozzle 2. This setting makes the blowing volume in the middle of the working area of ​​the nozzle 2 large and the blowing volume on both sides small. Of course, the insertion depth of the nozzle 3 can also be gradually increased from the starting end to the tail end in the working area of ​​the nozzle 2. This setting makes the air volume ejected by all nozzles 3 along the nozzle 2 relatively uniform.

[0029] The connection method between the inlet end of the nozzle 2 and the drying air duct is selected according to the actual situation on site, and flange connection, hose connection, etc. can be used.

[0030] like Figure 1 and Figure 2 As shown, in this embodiment, the box body 1 is elevated and installed by the support 4.

[0031] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A pre-blow device for heat-treated materials before entering the furnace, characterized in that: It includes a box body, a spray pipe and a nozzle; the box body is covered on the roller table in front of the furnace and has an inlet and outlet for heat treatment materials; the spray pipe extends into the box body and is distributed up and down along the heat treatment material passing line and is located between the conveying rollers, the inlet end of the spray pipe is connected to the dry air duct outside the box body, and the upstream of the dry air duct exchanges heat with the flue gas generated by the combustion of the burner of the heat treatment furnace body through a heat exchanger; the nozzles are distributed on the spray pipe and point to the heat treatment material passing line.

2. The pre-furnace blowing device for heat treatment material according to claim 1, characterized in that: The nozzle is of the internal insertion type and the depth of insertion into the nozzle can be adjusted.

3. The pre-furnace blowing device for heat treatment material according to claim 2, characterized in that: The insertion depth of the nozzle gradually increases from the starting end to the tail end of the nozzle working area.

4. The pre-furnace blowing device for heat treatment material according to claim 2, characterized in that: The insertion depth of the nozzle in the middle of the nozzle working area, which is located in the transverse center of the heat-treated material, is the smallest. The insertion depth of the nozzle gradually decreases from the tail end to the transverse center of the heat-treated material in the nozzle working area. The insertion depth of the nozzle gradually increases from the starting end to the transverse center of the heat-treated material in the nozzle working area.

5. The pre-furnace blowing device for heat treatment material according to claim 1, characterized in that: The inlet end of the nozzle is connected to the drying air duct through a flange or a hose.

6. The pre-furnace blowing device for heat treatment material according to claim 1, characterized in that: The box is installed by lifting it through the support.

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